<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
	.a1{
		background-color:#F00;
		width:1000px;
		height:100px;
		float:left;
		margin-bottom:10px}
	.a2{
		background-color:#939;
		width:190px;
		height:300px;
		float:left;
		margin-right:10px}
	.a3{
		background-color:#690;
		width:600px;
		height:300px;
		float:left;}
	.a4{
		background-color:#C96;
		width:190px;
		height:300px;
		float:left;
		margin-left:10px}
	.a5{
		background-color:#C3F;
		width:1000px;
		height:100px;
		float:left;
		margin-top:10px}
	.father{
		width:1000px;
		margin:auto}
</style>
</head>

<body>
<div>
	<div class="father">
    	<div class="a1"></div>
        <div class="a2"></div>
        <div class="a3"></div>
        <div class="a4"></div>
        <div class="a5"></div>
    </div>
</div>
</body>
</html>


